[4][5] The Batallón Olimpia took an active part in various moments of the 1968 Movement, including: Because members of the battalion were undercover soldiers and police officers dressed in civilian clothes, they identified each other through white handkerchiefs or gloves.
The battalion played an active part in these events, orchestrating a simulated confrontation near the armed student movement and the Mexican military.
In addition to these armed actions, there is a record of the battalion allegedly performing illegal detentions, abuse, torture, and raids of people's homes.
The order to fire against the army and the protesters came from Secretary of the Interior Luis Echevarría Álvarez.
It occurred on June 10, 1971 when the paramilitary group the Halcones killed 120 people who were protesting in support of the Monterrey students.